C8051F336DK Silicon Laboratories Inc, C8051F336DK Datasheet - Page 199
![DEV KIT FOR C8051F336](/photos/9/23/92341/c8051f336dk_sml.jpg)
C8051F336DK
Manufacturer Part Number
C8051F336DK
Description
DEV KIT FOR C8051F336
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F336DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F33x
Interface Type
USB, UART
Operating Supply Voltage
7 V to 15 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F336
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1430
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SFR Definition 24.13. TMR3CN: Timer 3 Control
SFR Address = 0x91
Name
Reset
Bit
1:0 T3XCLK[1:0] Timer 3 External Clock Select.
Type
7
6
5
4
3
2
Bit
T3SPLIT
TF3CEN
TF3LEN
Name
TF3H
TF3L
TR3
TF3H
R/W
7
0
Timer 3 High Byte Overflow Flag.
Set by hardware when the Timer 3 high byte overflows from 0xFF to 0x00. In 16 bit
mode, this will occur when Timer 3 overflows from 0xFFFF to 0x0000. When the
Timer 3 interrupt is enabled, setting this bit causes the CPU to vector to the Timer 3
interrupt service routine. This bit is not automatically cleared by hardware.
Timer 3 Low Byte Overflow Flag.
Set by hardware when the Timer 3 low byte overflows from 0xFF to 0x00. TF3L will
be set when the low byte overflows regardless of the Timer 3 mode. This bit is not
automatically cleared by hardware.
Timer 3 Low Byte Interrupt Enable.
When set to 1, this bit enables Timer 3 Low Byte interrupts. If Timer 3 interrupts are
also enabled, an interrupt will be generated when the low byte of Timer 3 overflows.
Timer 3 Low-Frequency Oscillator Capture Enable.
When set to 1, this bit enables Timer 3 Low-Frequency Oscillator Capture Mode. If
TF3CEN is set and Timer 3 interrupts are enabled, an interrupt will be generated on
a falling edge of the low-frequency oscillator output, and the current 16-bit timer
value in TMR3H:TMR3L will be copied to TMR3RLH:TMR3RLL.
Timer 3 Split Mode Enable.
When this bit is set, Timer 3 operates as two 8-bit timers with auto-reload.
0: Timer 3 operates in 16-bit auto-reload mode.
1: Timer 3 operates as two 8-bit auto-reload timers.
Timer 3 Run Control.
Timer 3 is enabled by setting this bit to 1. In 8-bit mode, this bit enables/disables
TMR3H only; TMR3L is always enabled in split mode.
This bit selects the “external” clock source for Timer 3. If Timer 3 is in 8-bit mode,
this bit selects the external oscillator clock source for both timer bytes. However, the
Timer 3 Clock Select bits (T3MH and T3ML in register CKCON) may still be used to
select between the external clock and the system clock for either timer.
00: System clock divided by 12.
01: External clock divided by 8 (synchronized with SYSCLK when not in suspend).
10: Reserved.
11: Internal LFO/8 (synchronized with SYSCLK when not in suspend).
TF3L
R/W
6
0
TF3LEN
R/W
5
0
TF3CEN
R/W
Rev.1.0
4
0
Function
T3SPLIT
R/W
3
0
C8051F336/7/8/9
TR3
R/W
2
0
1
0
T3XCLK[1:0]
R/W
0
0
199
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